175 top end on YZ125G?

[oldmxracer]

Hello my Australian friends. Been snooping/researching an IT175 cylinder/1980 YZ125 combo. What year IT cylinder best for a 125G lower end? Use the 125 carb and pipe? Would use the bike for MX age class racing....

[cyclegod]

IT175 G or H (80-81) top end is what you need, use the IT carb but choose whichever pipe suits your riding style. The "G" 125 pipe is quite peaky on the 175.

[Nathan S]

Why CG said.
The earlier IT-D/E/F top ends won't fit (different motor), and the later IT175J/K top end will fit but have a centre exhaust port which doesn't work with the YZ frame.

FWIW, there's a very nice IT175G/YZ125G hybrid that has been turning up to Heaven events, and its quick.

[holeshot buddy]

i have  a yz175 barrel
i know they fit a c model

[jimg1au]

must be a mx175 as 1976 yz175 they made the barrel bigger it wont fit c or x.crankcases are different also.found all this stuff out chasing parts for my x
jim

[TM BILL]

i have  a yz175 barrel
i know they fit a c model

Is it for sale ? if so what oversize is it on and how much 

[oldmxracer]

Thanks all.